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authorKeith Busch <keith.busch@intel.com>2015-01-07 18:55:46 -0700
committerJens Axboe <axboe@fb.com>2015-01-08 08:59:01 -0700
commit5b3f25fc343690cafd3e27431a69a7bdaf9df001 (patch)
tree8892062d8290c520faf5daf355bcc303501919d5 /block/blk-mq.c
parent1885b24d23716e09b9c952822b05fd7f68099cdb (diff)
blk-mq: Allow requests to never expire
Some types of requests may be started that are not gauranteed to ever complete. This adds a request flag that a driver can use so mark the request as such. Signed-off-by: Keith Busch <keith.busch@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-mq.c')
-rw-r--r--block/blk-mq.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 261ccd89e15d..78324a2f0e10 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -619,7 +619,7 @@ void blk_mq_rq_timed_out(struct request *req, bool reserved)
break;
}
}
-
+
static void blk_mq_check_expired(struct blk_mq_hw_ctx *hctx,
struct request *rq, void *priv, bool reserved)
{
@@ -627,6 +627,8 @@ static void blk_mq_check_expired(struct blk_mq_hw_ctx *hctx,
if (!test_bit(REQ_ATOM_STARTED, &rq->atomic_flags))
return;
+ if (rq->cmd_flags & REQ_NO_TIMEOUT)
+ return;
if (time_after_eq(jiffies, rq->deadline)) {
if (!blk_mark_rq_complete(rq))